doloire



(No Model.) 3 Sheets-Sheet 1.

L. DOLOIRB 8v C. GOLAY.

MILL.

P sented Nov. 3, l1891. i?

WIV/www.' Lmv'sowfe M we 'mams runas co., mow-uma, wnsmunmu, n. c.

(No Model.) 3 Sheets-Sheet 2. L. DOLOIRE 850. GOLAY.

MILL. No. 462,372. Patented Nom-3, 1891.

(No Model.) 8 Sheets-Sheet 3.

L. DOLOIRE 8u C. GOLAY.

MILL.

Patentedu Nov. 3 tu lNrrn STATES PATENT GFFIC.

LOUIS DOLOIRE AND CHARLES GOLAY, OF PARIS, FRANCE.

MILL'.

SPECIFICATION forming part of Letters Patent No. 462,372, dated November3,1891.

Application filed January 29, 1891. Serial No. 379,546. (No model.)Patented in France June 30, 1890, No. 206,702.

T0 @ZZ whom, t may concern,.-

Be it known that we, LOUIS DOLOIRE, a citizen of the Republic of France,and CHARLES GOLAv, a citizen of the Republic of Switzerland, engineers,both residents of Paris, in the Republic of France, have inventedcertain neit7 and useful Improvements in Mills, (for which we haveobtained Letters Patent in France, No. 206,702, dated June 30, 1890;)and we do hereby declare the following' to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters of reference markedthereon,whieh form a part ot' this specification.

The invention relates to grinding-mills, and more especially to thosemills designed for grinding cereals into Aflour or meal, and has for itsobject to simplify the construction of such mills by combining1 in 011eand the same machine a series of grinding and bolting or separating andpurifying devices, so that at one operation cereals may be ground intoiiour of the desired degree of iineness and the resulting lay-productsseparated and collected separately. In this manner we are enabled todispense with aplurality of separate grinding-mills and separating orbolting and purifying devices. and with the means for trans ferring theiiour to and from said separate grinding devices to and 'from theseparating or bolting and purifying devices, and we are also enabled toeiifect a great saving inpower as well as labor and expenditures inmaintenance and repairs,

The invention consists in structural features and in combinations otelements7 as will now be fully described, reference being' had to theaccompanying drawings, in which- Figure lis a vertical axial section onor about on line 1/ y yysof agrinding-mill embodying our invention. Fig.2 is a section thereof, taken on or about online a; a" :r2 x3 of Fig. l.Fig. 3 is a projection of the cover 'for the revoluble grinding-disk.Fig. i is a diagrammatic plan view illustrating the means i'orindependently adjusting' each of the stationary grinding-disksrelatively to their respective revoluble grinding-disks; and Fig. 5 is avertical section, drawn to an enlarged scale, of one-half of theco-operating grindingdisks, illustrating a part of the devices foradjustin g the stationary grinding-disks relatively to their respectiverevoluble co-operating grinding-disks.

The operating mechanism is supported from a suitable frame-work, whichis preferably ot castiron and consists of three pillars or standards L,proj ectinglfrom the outer end of three arms L3, that radiate from acentral bearing forming a spider, which and the pilla-rs L constitutethe base and vertical supports of the mill. In the central bearing ofthe spider is fitted the contracted neckof the axle or bearing-box E forthe lower end of the vertical spindle C, which latter isA stepped on acone pin F, that has bearing on a lever G. The lever is fulcrumed to oneot' the radial arms L3, and to the free end of said lever is pivoted ascrew-threaded adj usting-bolt liI, that extends vertically through abearing-sleeve h on one of the other radial arms of the spider andcarries a hand-wheel I, the hub of which is screw-threaded interiorly.The wheel has a milled or toothed edge, into which takes aspring-pawljfor the purpose of locking the said wh eel againstaccidental rotation. It is obvious that when the wheel I is rotated inone or the other direction the lever G is either depressed or elevated,thereby lowering or elevatingthe spindle C, for purposes presently to be`explained. The spindle C is centered by means of centeringscrews s,that have bearing upon a bearing-sleeve s', and said spindle carriesabelt-pulley D, belted to any suitable motor. Each pillar L has an arm L2radiating from a central bearing,

through which the spindle passes, said arms lj2 serving asa support foran inclosing casing 'or housing and for the collectors.

The inclosing easing is constructed as follows: U is the bottom or baseplate, to which is secured a fianged ring u', that serves as a seat forand to which is secured the foot or lower edge ot the cylindricalsheet-metal housing U. 'll-he upper edge of the cylindrical sheet-metalhousing is secured to a ring U2, that in cross-section has the form of across, the upper vertical and inner horizontal arms of which serve as aseat for a removable sheet-metal cover V, said ring U2 being providedwith bolt-tlanges u2, by means of which IOO and suitable bolts it isfirmly bolted to the piilars L, as shown onithe right of the machine inFigs. l and 3.

In the cover V is formed a central aperture o of sufficient size toadmit free ingress and egress of air for purposes presently explained.The Asheet-metal inclosing cylinder is constructed in sections, two ormore of which are detachably connected with their supportingrings forthe purpose of gaining access to the interior of the housing below thegrinding devices and to the collectors, or the said sheetmetal inclosingwall may be provided with suitable man-holes or doors. The collectors tt2 are formed of concentric sheet-metal cylinders arranged below thegrinding and boltingV devices upon the bottom of the housing, and insaid bottom are formed suitable discharge-spoutsS, of whichv there isone for' i tubular and of increased cross-sectional area and has itsbearing in aY box K, from which radiate three arms L', that are boltedto the upper ends of the pillars L, means for centering the spindle atits upper end, similar to those for centering its lower end, beingprovided, as shown in Fig. 1. At the lower end of the tubular portion ofthe spindle, Fig. l, ports c are formed for conducting the grain to thegrinding devices, said grain being fed into said tubular portion throughthe medium of afeed-duct Z. u

The stationary grinding devices consist of a plurality of independentconcentric grinding disks or rings, ot' which five are shown in thedrawings, as at B, B2, B2, B4,.and B5; but we do not desire to limitourselves to this number. The central disk B has an axial opening forthe passage of the spindle C and for the reception of the hub of aspider having three radial arms L4, that serve as supports for theindependent concentric grindingdisks and the means for adjusting saiddisks independently, as will be hereinafter more lfully described. Theseconcentric grindingdisks B', dac., are of such relative diameters ordimensions as to leave a suitable space between each two disks andbetween the outer disk and the vertical wall of the housing, and theyare armed with asteel grinding-face, (indicatedin Fig. 3 bythecorresponding lowercase letters 7J to b5, respectively.) These steelgrinding-facesb b2, &c.,aredetachablysecured to the disk B and rings B2,&c.,so that they may be readily removed when neccessary. .The

' steel facings may have any desired or suitable dress, and, as shown,are of less diameter than the disk B and rings B2, dac., so that thereis an annular seat formed around the steel facing of the central disk Band a like seat on opposite sides of the steel facings of the rings B2B2,&c., upon .which seats are seated the separating or screening orbolting frames T', T2, T3, T4, and T5, the outer bolting-frame beingseated on the ring B5 and on the inner horizontal flange of the ring U2of the housing, in whose vertical wall is formed an aperture orapertures V', (see Figs. l and 5,) normally closed by a valve or gate,for the discharge of the tailings. As shown in Figs. l and 5, thescreening or bolting frames are so arranged that their screening orbolting faces are on a level with or but slightly below thegrinding-faces, so that the material will readily pass from one set of disks or rings to the other. The space between the grinding-disk and therings B B2, &c., in which are arranged the separating or bolting'screensT T2, o., as shown more plainlyin Fig. 5, is divided by an annularvertical perforated partition (indicated by W', W2, NVS, W4, and W5,respectively) into two annular separating or bolting chambers. The sizeof the perforations in or the mesh of the annular partitions relativelyto the perforations in or the mesh of the screens or bolts are such asto allow the coarser stuff that will not pass through the screens orbolts to pass freely through the meshes or perforations of thepartitions which are employed to retard the passage of the coarsermaterial from one pair of grinding-rings to the other, so that thematerial may be thoroughly screened or bolted before such passage fromone pair ot` grinding-rings to the other. The dress of the grindingdevices and the mesh of the screens-or bolts is preferably such as togradually increase in iineness from the inner to the outer sets `ofgrinding devices, and, as shown in Fig. 6, for purposes well understood.V

The disk or ring B and the rings B2 B3 B4 B5 are provided in their underface with sockets for the reception of the unthreaded upper ends ofadjusting-screws M, M2, M2, and M4, that work in interiorly threadedbearings formed in the three radial arms L4 of the spider,hereinbeforereferred to, so that each of said rings is supported by threeadjustingscrews, except the outer ring B5, which is supported directlyfrom the arms L4, whose outer ends have bearing on a bracket 296,projecting from each of the pillars L, thus providing a firm bearing forsaid arms and alike support for the stationary grindingrings. Theserings, as heretofore stated, with the exception of the outer ring B5,are adj ustable vertically by means of the sets of four screws M, M2,M3, and M4 in the following manner, and as more plainly shown in Fig. 4:To each of the screws is keyed a sprocket-wheel, (indicated by N', N2,N2, and N4,) and the sprocket-wheels of a set of three screws supportinga grindingring are connected by an endless chain, (indicated by O', O2,O3, and O4, respectively.) Furthermore, one screw of each set of threescrews has keyed thereto below its sprocketwheel a worm-wheel,(indicated by P P2 P3 P4.) On opposite sides of two of the pillars L isformed a bearing Z for an actuating-rod, the set of four rods beingindicated by R', R2, R3, and R4, each of which rods has an endlessscrew-thread, (indicated, respectively, by Q Q2 IOO IIC

'strength to said disk.

Q3 Q43) that meshes with its respective wormwheel P,P2, P2, and Pt. Bymeans of the described arrangement of the adjusting mechanism theattendant has the same well under his control, as he can manipulate theactuating-rods for two of the grinding-rings separately orsimultaneously, each of said rods carrying a hand-wheel, (indicated byS, S2, S3, and S4, respectively.) It is evident thatit', for instance,the hand-wheels S S2 are revolved in the proper direction, therebyrevolving the rods R and R2, and through the same the worm-wheels P andP2, the three screws M', that support the grinding disk or ring B', andthe three screws M2, that support the grinding-disk B2, will besimultaneously revolved, inasmuch as they are connected together bymeans of their sprocket-wheels N and chain O and the sprocket-Wheels N2and chain O2, respectively, so that said rings will either be lowered orelevated, according to the direction of rotation of the hand-wheels Sand S2. In a similar manner the rings B2 and B4 may be adjusted bymanipulation of the handwheels S3 and S4. The outer ringB5 is notadjustable vertically, its position relatively to its co-operativerevoluble ring being effected by adjusting the spindle D by means of thehand-wheel I and screw Il, as hereinabove described, the revolublegrinding-rings being keyed to said spindle, as will now be described.

The revoluble grinding devices consist of a disk A, that has concentricoutwardly-inclined annular ribs A', A2, A3, A4, and A5, each faced witha steel grinding-ring a', CL2, d3, a4, and a, respectively, thatco-operate with the like stationary steel rings b', b2, b3, b", and b5,respectively, (see Fig. 5,) and, as more plainly shown in said Fig. 5the said annular outwardly-inclined ribs are of gradually-increasingheight from the outer to the inner one, thus forming a cone that impartsgreat As shown at A7, Fig. 5, a portion of the annular ribs A A2, the.,from their upper edge downward is of reduced thickness for the purposeof reducing the weight ot the disk A, and are interrupted by radial websAJ`,which are of about the same thickness as the reduced upper portionof the annular ribs. (See Fig. 2 The radial webs A divide the spacesbetween the annular ribs into segmental open-ended chambers oi' a widthequal to the space between the concentric stationary grinding-rings B bB2 b2, the., thus providing a series of air-chambers for each set ofgrinding devices to prevent overheating and for the purpose of supplyingair to the separators or bolts to prevent the ground material frombecoming heated. The diskA In order to facilitate the passage of the`ground material from the several screens to and between thegrindingrngs the inner edges ot both sets of rings are slightly beveledor rounded to form a Wedge-shaped passage, as more plainly shown in Fig.5, and the revoluble grindingrings, like the stationary rings, havetheir grinding-faces suitably dressed and are detachably secured to theannular ribs for obvious purposes.

The disk A is closed at top by a sheetmetal cover Y, which is providedwith inclined air-ducts Y', and there is one such duct for each radialchamber, the opening or airintake ot said ducts being in the directionof rotation of the disk A, as more plainly shown in the projection, Fig.3. As shown, the air-ducts incline in the direction opposite to thedirection of rotation of the disk A, thereby directing the air taken indownwardly into the screening or bolt-ing chambers and through thebolts, ettectually cooling the grinding devices and the ground material.

As heretofore stated, the cover V tor the housing has a comparativelylarge central opening, and as the disk A revolves the air is drawn inthrough the opening fu by the centrifugal action of the disk, said airrushing into the raised inclined air-ducts, and thence into the radialchambers to the grindingrings, and thence to and through the screens andthrough an opening or openings V2, Fig. 1, in the housing U, acirculation of air being thus established that will keep both grindingdevices and the ground material perfectly cool, which is ot'greatimportance in machines of this class.

In Figs. 1 and 5 we have shown three concentric collectors formed by thevert-ical walls U of the housing and by the concentric pai'- titions15153, thus providing three collectorsthe one t for the coarser or blackflour from the screen T', the collector t2 for the middlings or tion rfro m the screens T2 and T3, and the collector for the flour from screenT5; but, if desired, a separate collector may be provided for eachscreen T2 T2, as will be readily understood.

lVe have hereinbefore stated that by preference the dress of thestationary grindingrings increases in iineness from the inner to theouter ring. Then this is the case, the dress of the revoluble rings ismade to correspond with that of the said stationary rings. Theperforations or the mesh of the screens or bolts and that of thevertical partitions also increase in tineness from the inner to theouter ones; but, as stated, the perforations or mesh of said verticalpartitions are coarser than the pertorations or mesh of the screen towhich it is connected. By providing a central feed, arranged asdescribed, the grain is not subjected to centrifugal action and forciblycarried to the grinding devices, but said grain is fed to the inner pairof grinding-rings by gravity only, thereby preventing an overfeed ofgrain. Under the in- IIO iiuence of the centrifugal action the lnotionof the partially-ground as well as the ground material increases as saidmaterials pass outl wardl` from one pair of grinding-rings to another,which motion, if unchecked, would not only result in an overfeed, butwould materially interfere with the screening orbolting; but this iseffectually avoided by the use of the vertical foraminous partitions Wto VW.

The separating, screening, or bolt-ing of the material may beaccelerated by the use of a brush X, whose holder is secured to theannular ribs A', &c., said brush being arranged to trail over thescreens T to 'l'4 inone or more of the annular compartments thereof, asshown in Fig. 5, and one or more of such brushes -inay be used for eachof said compartments.

Although the means we have devised for independently adjusting thestationary grinding-rings B B2 B3 B4 relatively to their cooperatingrevoluble grinding-rings are very simple and effective, we do not desireto limit ourselvesthereto, as other means well known to mechanics may beemployed for this purpose; and although we have described our inventionas applied to mills for grinding cereals, we do not desire to limitourselves to this application, as it is apparent that other materialsmay be reduced or ground and screened or bolted.

Having thus described our invention, what we claim isl. In agrinding-mill, the combination, with a number of stationary concentricgrindingrings, a corresponding number of co-operating revolublegrinding-rings, and screens'interposed between each two sets of suchrings on or about on a level with the grindingfaces of the lower rings,of circular foraminous partitions dividing each of the spaces betweentwo compartments, for the purpose set forth.

2. In a grinding-mill, the combination, with a number of concentricrevoluble grindingrings, a corresponding number of like stationarygrinding-rings of such relative diameter as to leave a space betweeneach pair of such, and means for allowing the material to move acrosssaid space from one pair of rings to the other, of an adjustingmechanism for separately adjusting all of the stationary rings,excepting one, relatively to their cooperating revoluble rings, and anadjusting mechanism for simultaneously adjusting the revoluble ringsrelatively to said stationary rings, for the purpose set forth.

3. In a grinding-mill, the combination,with the lower grinder composedof a series of independent concentric grindingrings constructed of metaland of such relative diameter as to leave an unbroken annular spacebetween each two rings and an annular screen in each of said spaces on alevel with the grinding-surfaces, of a metallic revoluble grindingdiskhaving a corresponding number of concentric circular grinding-ribsadapted to cooperate with said stationary rings and having radial websconnecting the circular ribs and dividing the interspaces into segmentalpassages or chambers, a cover for said disk, provided with an air-ductfor each of the segmental chambers, said ai'r-ducts having their intakein the direction of rotation of the grinding-disk, and an inclosingvcasing provided with an air-inlet in.its roof,for the purpose set forth.

4. In a grinding-mill, the combination, with the lower stationarygrinder consisting of a series of independent metallic concentricgrinding-rin gs of such relativel diameter as to leave an unbrokenannular space between each two disks or rings and an annular screenarranged in each of said spaces on a level with the grinding-surfaces,of a revoluble grinding-disk having a corresponding number of concentriccircular grinding-ribs adapted to co-operate with said stationarygrinding-rings, radial webs connecting the ribs and dividing theintel-spaces into segmental passages or chambers, a cover secured tosaid disk and provided with an air-duct for each of said segmentalchambers, said air-ducts having their intake in the direction ofrotation of the disk and inclining downwardly in a reverse direction,and an inclosing casing provided with an air-inlet in its roof, for thepurpose set forth.

5. In a grinding-mill, the combination, with the upper revoluble andlower stationary grinders, each composed of a series of circularconcentric grindingrings of such relative diameter as to have anunbroken annular space between each pair of rings, a screen between eachtwo stationary rings on or about on a level with the grinding-surfaces,and a like screen encompassing the outer lower grinding-ring, of ahousing for the grinders, provided with an opening or openings for thedischarge of the material too coarse to pass through the outermostscreen, and concentric chambers' arranged in the housing below thescreens for the reception of the screened material, for the purpose setforth.

6. In a grinding-mill, the combination, with the upper revoluble andlower stationary grinders, each composed ot a series ofconcentrically-arranged gri nding-rings having an unbrokengrinding-surface, an unbroken annularscreen arranged between each tworings, and a like screen encompassing the outer one of said rings, saidscreens being arranged on or about on a level with thegrinding-surfaces, of a housing encompassing the grinders and providedwith peripheral discharge ports leading to thel outer screen,concentricallyarranged collectors within the housing below the screens,and a central feed for feeding the material to theinner set ofgrinding-rings, for the purpose set forth.

7. In agrinding-mill, the combination,with a series of concentricco-operating sets of grinding devices, the dress of whic'h graduallyincreases in finencss from the inner to IOO IIO

the outer set, and a central feed for feeding the material to the innerset, of a screen interposed between each two sets of grinding devices,the mesh of which screens increases in fineness from the inner to theouter one, for the purpose set forth.

8. In a grinding-mill, the combination, with a series of concentricco-operating sets of grinding' devices, the dress of which graduallyincreases in fineness from the inner to the outer set, and a centralfeed for feeding the material to the inner set, of a screen interposedbetween each two sets of grinding devices, the mesh of which screensincreases in fineness from the inner to the outer one, and concentriccollectors arranged below the grinding devices for collecting thescreened material, for the purpose set forth.

t). In a grinding-mill, the combination, with a number of concentricco-operating sets of grinding devices and a screen or bolt interposedbetween cach two sets of such devices, of circular foraminous partitionsdividing each of the spaces between saidsets of grinding devices abovethe screens or bolts into two compartments, and a traveling brush forand trailing upon the screen or bolt for each of said compartments, forthe purpose set forth.

l0. In a grinding-mill, the combination, with a series of concentriccooperating sets of grinding devices, the dress of which graduallyincreases in iiueness from the inner to the outer set, and a centralfeed for feeding the material to the inner set, of a screen interposedbetween each two sets of grinding devices, the mesh of said screensincreasing in iineness from the innerto the outer one, and a foraminouspartition dividing the space between the several sets of grindingdevices above the screens into two compartments, the mesh of saidpartitions increasing in iineness from the inner to the outer one, butbeing coarser than the mesh of their respective screens, for the purposeset forth. A

11. In a grinding-mill, the combination, with `a number of sets ofconcentric cooperating grinding devices and a screen or bolt interposedbetween each two sets, of vertical foraminous partitions dividing eachof the spaces between said sets of grinding devices above the screens orbolts into two compartments, said partitions having a coarser mesh thantheir respective screens or bolts, for the purpose set forth.

l2. In a grinding -mill, the combination, with independent stationaryconcentric grinding disks or rings, each of-which is provided with a numberof sockets in the under side, of a spider having a corresponding numberof radial arms provided with interiorlythreaded bearings, adjListing-screws extending into said sockets and working in said bearings,a sprocket-wheel on each of said screws, an endless chain connecting thesprocketwheels of the screws of each grinding disk or ring into aseries,a worm-wheel on one ot' the screws of each series, andaworm-spindle for revolving said worm, for the purpose set forth.

13. In a grinding-mill, the combination, with a set of concentricgrinding disks or rings composed of an outer stationary disk or ring anda plurality of independent verticallyadjustable concentric disks orrings, of a revoluble and vertically-adjustable grindingdisk providedwith concentric grinding-faces adapted to co-operate with saidstationary and independent vertically-adjnstable disks or rings, for thepurpose set forth.

14. In a grindingmill, the combination, with a set of concentricgrinding disks or rings composed of an outer stationary disk or ring anda plurality of independent verticallyadjustable concentric disks orrings, of avertically-adjustable spindle and centering devices forcentering said spindle, and a disk rigidly secured to the spindle andprovided with concentric grinding-faces adapted to cooperate with saidstationary and independent grinding disks or rings, for the purpose setforth.

In witness whereof we have hereunto set our hands in the presence of twosubscribing witnesses.

LOUIS DOLOIR-E. CHARLES GOLAY.

Witnesses:

LUCIEN DURIEUX, VITAL DEROUARD.

